/Engine/Plugins/Online/OnlineFramework/Source/Party/Public/Chatroom.h
Leave the joined chat room
void LeaveChatRoom ( const [FUniqueNetIdRepl](API\Runtime\Engine\GameFramework\FUniqueNetIdRepl) & LocalUserId, const [FOnChatRoomLeft](API\Plugins\Party\FOnChatRoomLeft) & CompletionDelegate )